The leader of the Port Authority of New York and New Jersey says he's optimistic about the agency's future even as the criminal case surrounding lane closures at the George Washington Bridge moves forward and a second investigation still looms.

Chairman John Degnan says there's an opportunity to learn from Friday's guilty plea of a former Port Authority official and the indictments of two other former allies of Gov. Chris Christie.

Degnan says the bridge case indictments can show the Port Authority if there are any other new reforms that should be undertaken.

But a separate investigation into Degnan's predecessor could still yield further embarrassment for the bistate authority.